Jig for ultrasonic bonding of loudspeaker and television rear cover

Abstract

The utility model relates to the technical field of loudspeaker bonding, and discloses a jig for ultrasonic bonding of a loudspeaker and a television rear cover, which comprises a base, an ultrasonic welding head, two clamping parts and a driving assembly. Wherein a mold is arranged on the base, the mold is used for containing the television rear cover, the ultrasonic welding head is located over the mold and can move up and down relative to the mold, the two clamping parts are symmetrically arranged at the top of the base in a sliding mode, and the driving assembly is in transmission connection with the two clamping parts. And the driving part is used for driving the two clamping parts to move towards each other or away from each other so as to clamp or loosen the mold. According to the utility model, the driving assembly is arranged to drive the two clamping parts to move simultaneously so as to clamp the die, the operation is simpler, the production efficiency is further improved, the loudspeaker is bonded through the ultrasonic welding head, the reliable connection between the loudspeaker and the rear cover of the television can be effectively realized, and the reject ratio is reduced.

Description

Technical Field

[0001] This utility model relates to the field of speaker bonding technology, specifically to a fixture for ultrasonic bonding of a speaker to the back cover of a television. Background Technology

[0002] The television speaker is one of the most important components of a television set. It is responsible for playing sound and is the primary source of sound when watching television programs. It is usually installed inside the back cover of the television. Current technology typically uses screws for installation. First, the speaker needs to be placed in a speaker bracket and then secured with screws. The back cover of the television needs to be prepared, and sealant needs to be applied to the back cover to improve the speaker enclosure's sealing performance and thus improve sound quality. Then, the speaker bracket with the speaker secured is placed inside the back cover and secured with screws. This assembly method is relatively cumbersome, requiring an additional sealant application process. Manually applying the sealant makes it difficult to control its evenness, affecting sound quality. Furthermore, the screw tightening force must be appropriate; too loose, and it will cause noise and instability; too tight, and it may crack the plastic pillars or strip the threads, resulting in a relatively high defect rate.

[0003] Ultrasonic assembly offers advantages such as speed, low cost, no need for additional adhesives, and elimination of screws. Chinese invention patent (application number: 202211540791.8) discloses an ultrasonic fixture for a speaker module, including an arm. A housing is bolted to one side of the arm's outer wall, and an ultrasonic generator is slidably connected to the inner wall of the housing. A baffle is welded to one side of the ultrasonic generator's outer wall. A column is mounted on the bottom outer wall of the arm, and a base is bolted to the bottom outer wall of the column. An operating platform is bolted to the top outer wall of the base, and a mold is placed on the top outer wall of the operating platform. The top outer wall of the operating platform has symmetrically distributed grooves, and symmetrically distributed second lead screws are slidably connected to the inner walls of the grooves. Internal threaded caps are screwed to the top outer walls of the second lead screws. Symmetrically distributed clamping plates are placed on the top outer wall of the operating platform, with the internal threaded caps tightly abutting the top outer walls of the clamping plates. The above method, after determining the mold's position, moves the clamping plates to hold the mold between the two clamping plates. Since the second lead screw is located inside the clamping plates, rotating the internal thread cap moves the internal thread cap downwards, thus fixing the clamping plates between the internal thread cap and the operating table. However, this method requires fixing both clamping plates separately during adjustment, which is cumbersome and results in low production efficiency. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the purpose of this utility model is to provide a fixture for ultrasonic bonding of a speaker and the back cover of a television.

[0005] The present invention relates to a fixture for ultrasonic bonding of a speaker to a television back cover, comprising:

[0006] A base, on which a mold is provided, the mold being used to place the back cover of the television set;

[0007] An ultrasonic welding head is located directly above the mold and can move up and down relative to the mold, used for ultrasonic welding of the speaker inside the back cover of the television.

[0008] The base includes two clamping parts, which are symmetrically and slidably disposed on the top of the base for clamping the mold.

[0009] A drive assembly is connected to the two clamping parts for driving the two clamping parts to move toward or away from each other to clamp or release the mold.

[0010] Preferably, the driving component includes:

[0011] A double-ended screw, wherein the double-ended screw is disposed inside the base, and the thread sequence at both ends of the double-ended screw is opposite;

[0012] Nuts, wherein two nuts are provided, and the two nuts are respectively threaded onto both ends of the double-ended screw;

[0013] A rotating part, located on the outside of the base, and connected to the double-ended screw drive;

[0014] A first guide block, one end of which is connected to the side of the nut, and the other end of which extends upward through the base and is connected to the corresponding clamping part. The top of the base is provided with a first guide groove that matches the first guide block, and the direction of the first guide groove is consistent with the direction of movement of the clamping part.

[0015] Preferably, the base is provided with mounting holes for the double-ended screw and the nut to be fitted together, and the mounting holes are connected to the first guide groove.

[0016] Preferably, the drive assembly further includes two second guide blocks symmetrically arranged on the side of the nut, and the sidewall of the mounting hole is symmetrically provided with two second guide grooves that match the two second guide blocks.

[0017] Preferably, bearings are provided at both ends of the double-ended screw, and the two bearings are respectively provided at both ends of the mounting hole.

[0018] Preferably, the rotating part is a knob.

[0019] Preferably, the rotating part is a motor.

[0020] Preferably, a pressure sensor is provided on the clamping surface of the clamping part, and the pressure sensor is connected to the motor electrical signal.

[0021] Preferably, the clamping part includes a mounting plate that is drive-connected to the drive assembly and a clamping rod disposed on the end of the mounting plate away from the drive assembly.

[0022] Preferably, the clamping part further includes a rubber pad disposed at the end of the clamping rod away from the mounting plate.

[0023] The present invention discloses a fixture for ultrasonic bonding of a speaker to a TV back cover. Its advantages are that by setting a drive component to drive two clamping parts to move simultaneously and clamp the mold, the operation is simpler and the production efficiency is improved. By bonding the speaker with an ultrasonic welding head, a reliable connection between the speaker and the TV back cover can be effectively achieved, reducing the defect rate. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the ultrasonic bonding fixture for the speaker and the back cover of a television described in this utility model;

[0025] Figure 2 This is a cross-sectional view of the ultrasonic bonding fixture for the speaker and the back cover of a television described in this utility model.

[0026] Figure 3 This is a schematic diagram of the nut installation according to the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Base, 101. Mold, 11. First guide groove, 12. Mounting hole, 13. Second guide groove, 2. Ultrasonic welding head, 3. Clamping part, 31. Mounting plate, 32. Clamping rod, 33. Rubber pad, 4. Drive assembly, 41. Double-ended screw, 411. Bearing, 42. Nut, 43. Rotating part, 44. First guide block, 45. Second guide block. Detailed Implementation

[0029] Example 1

[0030] like Figure 1-3 As shown, the ultrasonic bonding fixture for the speaker and the back cover of a television in this embodiment includes a base 1, an ultrasonic welding head 2, two clamping parts 3, and a drive assembly 4. The base 1 has a mold 101 for holding the back cover of the television. The ultrasonic welding head 2 is located directly above the mold 101 and can move up and down relative to the mold 101 for ultrasonic welding of the speaker inside the back cover of the television. The two clamping parts 3 are symmetrically slidably disposed on the top of the base 1 for clamping the mold 101. The drive assembly 4 is connected to the two clamping parts 3 for driving the two clamping parts 3 to move towards or away from each other to clamp or release the mold 101.

[0031] Ultrasonic welding is a welding technique that uses high-frequency vibration waves transmitted to the surfaces of two objects to be welded. Under pressure, the surfaces rub against each other, causing fusion between molecular layers. This technology is a fast, clean, and efficient assembly process, widely used for welding and bonding thermoplastic parts and some synthetic components. The ultrasonic welding head 2 couples the ultrasonic waves generated by the ultrasonic transducer into the object being processed (the speaker), thereby bonding the speaker to the back cover of the television. The ultrasonic welding head 2 can be driven to move up and down by an external lifting device.

[0032] In this embodiment, the mold 101 is first placed at a designated position on the base 1. Then, the drive assembly 4 drives the two clamping parts 3 to move closer to each other and clamp the mold 101. Then, the assembled speaker and TV back cover are placed into the slot of the mold 101. The ultrasonic welding head 2 is driven to move downward by the external lifting device to press the speaker and TV back cover, and then ultrasonically bond them together. This effectively achieves a reliable connection between the speaker and the TV back cover. The operation is simple and eliminates the steps of adding adhesive and screwing in the traditional assembly process, thus improving production efficiency.

[0033] Please refer to Figure 2 The drive assembly 4 includes a double-ended screw 41, two nuts 42, a rotating part 43, a first guide block 44, and two second guide blocks 45. The double-ended screw 41 is located inside the base 1, with the threads at both ends of the screw 41 in opposite order. The two nuts 42 are threaded onto both ends of the double-ended screw 41. The rotating part 43 is located on the outside of the base 1 and is connected to the double-ended screw 41. One end of the first guide block 44 is connected to the side of the nut 42, and the other end extends upward through the base 1 and connects to the corresponding clamping part 3. The top of the base 1 has a first guide groove 11 that matches the first guide block 44, and the direction of the first guide groove 11 is consistent with the direction of movement of the clamping part 3.

[0034] In this embodiment, the rotating part 43 is a knob, which can be a regular shape such as a circle or polygon, or an irregular shape. In operation, rotating the knob causes the double-ended screw 41 to rotate. Since the thread sequence at both ends of the double-ended screw 41 is opposite, when the double-ended screw 41 rotates, due to the action of the first guide groove 11 and the first guide block 44, the nut 42 moves along the axial direction of the double-ended screw 41, thereby causing the two clamping parts 3 to move towards or away from each other, thus clamping or releasing the mold 101. In this embodiment, clockwise rotation can be defined as the positive direction; during clockwise rotation, the two clamping parts 3 move towards each other, i.e., move closer to each other. Counterclockwise rotation is defined as the negative direction; during counterclockwise rotation, the two clamping parts 3 move away from each other, i.e., move further apart.

[0035] Please refer to Figure 2 and Figure 3The base 1 has mounting holes 12 for the double-ended screw 41 and nut 42 to be fitted together. The mounting holes 12 communicate with the first guide groove 11, facilitating the installation of the double-ended screw 41 and nut 42. Specifically, the mounting holes 12 are coaxially arranged with the screw 41. Two second guide blocks 45 are symmetrically arranged on the side of the nut 42. The sidewalls of the mounting holes 12 are symmetrically provided with two second guide grooves 13 that match the two second guide blocks 45. The second guide blocks 45 further guide the axial movement of the nut 42 and improve the stability of its axial movement. Preferably, any second guide block 45 is perpendicular to the first guide block 44.

[0036] Preferably, bearings 411 are provided at both ends of the double-ended screw 41, and the two bearings 411 are respectively provided at both ends of the mounting hole 12 to facilitate the rotation of the double-ended screw 41; in addition, a bearing 411 can also be provided in the middle of the double-ended screw 41 to provide support on the one hand and further facilitate rotation on the other hand.

[0037] Preferably, the clamping part 3 includes a mounting plate 31 that is driveably connected to the drive assembly 4, and a clamping rod 32 disposed at the end of the mounting plate 31 away from the drive assembly 4. Specifically, the mounting plate 31 may be disposed on the top of the first guide block 44. When the first guide block 44 moves, it drives the mounting plate 31 to move, thereby driving the clamping rod 32 to move closer to or away from the mold 101. Further, two clamping rods 32 are provided, and the two clamping rods 32 are symmetrically disposed at both ends of the mounting plate 31, making the clamping of the mold 101 more stable. Furthermore, the clamping part 3 also includes a rubber pad 33 disposed at the end of the clamping rod 32 away from the mounting plate 31. The rubber pad 33 can, on the one hand, increase the friction between the clamping rod 32 and the mold 101, improve the stability of clamping, and on the other hand, transform the hard connection between the clamping rod 32 and the mold 101 into a soft connection, reducing the damage of the clamping rod 32 to the mold 101.

[0038] Example 2

[0039] The technical solution in this embodiment is largely the same as that in Embodiment 1, except that the rotating part 43 is a motor. The motor electrically drives the double-headed screw 41 to rotate, thereby causing the two clamping parts 3 to clamp or loosen the mold 101, making the operation more convenient. Preferably, a pressure sensor is provided on the clamping surface of the clamping part 3. The pressure sensor is connected to the motor electrical signal. The pressure sensor can detect the pressure between the clamping part 3 and the mold 101. When the pressure reaches a threshold, the motor stops working, improving the safety of operation and increasing the degree of automation.

[0040] In summary, this utility model simplifies operation and improves production efficiency by using a drive component 4 to move two clamping parts 3 simultaneously to clamp the mold 101. By using an ultrasonic welding head 2 to bond the speaker, a reliable connection between the speaker and the back cover of the television can be effectively achieved, reducing the defect rate.

[0041] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0042] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this utility model.

Claims

1. A fixture for ultrasonically bonding a speaker to the back cover of a television set, characterized in that, The utility model relates to a television back cover ultrasonic welding device, including: Base (1), be provided with mould (101) on base (1), mould (101) is used for placing television back cover, Ultrasonic welding head (2), ultrasonic welding head (2) are located mould (101) just above, and can move up and down relative to mould (101), are used for carrying out ultrasonic welding to the loudspeaker in television back cover, Clamping portion (3), clamping portion (3) are provided with two, two clamping portion (3) symmetrical sliding are provided in the top of base (1), are used for clamping mould (101), Driving assembly (4), driving assembly (4) are driven with two clamping portion (3) transmission connection, are used for driving two clamping portion (3) move towards or away from each other to clamp or release mould (101).

2. The horn and TV rear cover ultrasonic bonding jig according to claim 1, characterized by, Driving assembly (4) includes: Double -end screw (41), double -end screw (41) are provided in the inside of base (1), the thread order of two ends of double -end screw (41) is opposite, Nut (42), nut (42) are provided with two, two nut (42) are respectively threadedly sleeved in the two ends of double -end screw (41), Rotary part (43), rotary part (43) are located the outside of base (1) with double -end screw (41) transmission connection, First guide block (44), one end of first guide block (44) is connected with the side surface of nut (42), and the other end penetrates out of base (1) and is connected with corresponding clamping portion (3) upwards, and the top of base (1) is provided with the first guide slot (11) matched with first guide block (44), and the setting direction of first guide slot (11) is consistent with the movement direction of clamping portion (3).

3. The horn and TV back cover ultrasonic bonding jig according to claim 2, characterized by, The installation hole (12) matched with the double -end screw (41) and the nut (42) is provided in the base (1), and the installation hole (12) is communicated with the first guide slot (11).

4. The horn and TV rear cover ultrasonic bonding jig according to claim 3, characterized by, Driving assembly (4) further includes two second guide blocks (45) symmetrically arranged on the side surface of nut (42), and the side wall of installation hole (12) is symmetrically provided with two second guide slots (13) matched with the two second guide blocks (45).

5. The horn and TV back cover ultrasonic bonding jig according to claim 4, characterized by, Both ends of double -end screw (41) are provided with bearing (411), and two bearings (411) are arranged at both ends of installation hole (12) respectively.

6. The horn and TV back cover ultrasonic bonding jig according to claim 2, characterized by, Rotary part (43) is a knob.

7. The horn and TV back cover ultrasonic bonding jig according to claim 2, characterized by, Rotary part (43) is a motor.

8. The horn and TV rear cover ultrasonic bonding jig according to claim 7, characterized by, The clamping surface of clamping portion (3) is provided with a pressure sensor, and the pressure sensor is electrically connected with the motor.

9. The horn and TV rear cover ultrasonic bonding jig according to any one of claims 1-8, wherein, Clamping portion (3) includes mounting plate (31) connected with driving assembly (4), clamping rod (32) arranged at one end of mounting plate (31) away from driving assembly (4).

10. The horn and TV back cover ultrasonic bonding jig according to claim 9, characterized by, Clamping portion (3) further includes rubber cushion (33) arranged at one end of clamping rod (32) away from mounting plate (31).

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